Sony KP-41T65C P SUB Contrast Adjustment Pcon, P SUB HUE, SUB Color Adjustment IHUE, Icol

SECTION 5

CIRCUIT ADJUSTMENTS

5-6. P IN P SUB CONTRAST ADJUSTMENT (PCON)

1.Receive the color-bar signal.

2.PICTURE : maximum

COLOR : minimum

BRIGHTNESS : minimum

3.Set to service mode.

4.Connect an oscilloscope between 9 pin of CN303 (A Board) and ground.

5.Select “ PCON ” and adjust so that waveform level is 1.55 ± 0.1Vp-p.

6.Write the data into memory. MUTING n ENTER

White 1.55 ± 0.1

White 1.55 ± 0.1

Black

Black

MAIN SCREEN PIP SCREEN

Fig. 5-5

5-7. P IN P SUB HUE, SUB COLOR ADJUSTMENT (IHUE, ICOL)

1.Receive the color-bar signal.

2.PICTURE : maximum

COLOR : center

BRIGHTNESS : center

3.Set to service mode.

4.Connect an oscilloscope between 5 pin of CN303 (A Board) and ground.

5.Select “ IHUE ” and “ ICOL ” , adjust them to have VB1 = VB4 and VB2 = VB3 in the waveform levels.

6.Raise “ ICOL ” data 1 steps higher.

7.Write the data into memory. MUTING n ENTER

VB1 VB2 VB3 VB4

Fig. 5-6

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